“I don’t think Macbeth is evil. I think he’s damaged. When we meet him, he’s a man who’s as good as his circumstances will allow. He serves his king loyally and looks after his soldiers,” Fassbender explained during an on-set interview with the Daily Mail. “Evil is a cloudy word, and something that’s not going to inform me to play the character in any other way than pantomime.”

The U.K. outlet gave audiences the first look at Fassbender as Macbeth (above), as well as Cotillard as the woman who drives him to murder King Duncan.

In Fassbender’s mind, Macbeth’s descent into madness isn’t caused simply by a lust for power, but a result of the bloody battles he has fought as leader of the Scottish army.

“He’s suffering from post-traumatic stress disorder. It makes total sense, when you think about it. Justin set the seed of the idea in my head,” Fassbender said. “This trauma is something we know about. In World War I they called it battle fatigue, and it was probably more horrific in Macbeth’s days, when they were killing with their bare hands, and driving a blade through bodies. He’s having these hallucinations, and he needs to return to the violence to find some sort of clarity, or peace.”